TROUBLE
PROBABLE CAUSE
REMEDY
Locking pin cylinder not
holding in up position.
Locking pin cylinder.
Replace cylinder (see Section 4-18).
Mounting plate not holding
position at end of rotation.
Rotary actuator.
Replace rotary actuator (see Section 4-16).
Mounting
plate
not
rotating.
Drive belt broken.
Replace drive belt (see Section 4-11).
Directional control valve for
rotary actuator.
Replace valve (see Section 4-15).
Rotary
actuator
in-
operative.
~Replace
rotary actuator (see Section 4-16).
Mounting
plate
knocker
block slamming into hard
stops.
Air in hydraulic system.
Add hydraulic fluid to reservoir and rotate moun
ting plate several times (see Section 4-4).
Time-delay relay TDR set-
ting too high.
Decrease relay time setting (see Section 3-5).
Low-speed flow control.
Adjust low-speed flow control (see Section 4-5).
Shock absorber cushion ad-
justment.
Adjust shock absorber (see Section 4-7).
Locking pin not entering
receiver holes in mounting
plate.
Drive belt slipping.
Tighten belt tension (see Section 4-10).
Incorrect setting
of
hard
stops.
Set hard stops (see Section 4-8).
Low-speed
flow
control
open too far.
Adjust lov9-speed flow control (see Section 4-5).
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